1895.] NATURAL, SCIENCES OF PHILADELPHIA. 311 



front, the latter gray pollinose; frontal bristles descending to base of 

 third antennal joint, three in each row directed backward; two pairs 

 of orbitals; face in profile slightly convex, retreating below, the 

 sides bare; ridges bristly on lower half; antenna; four-fifths as long 

 as the face, black, the base of the third joint yellowish, this joint 

 two and one- half times as long as the second; arista thickened on the 

 basal fourth, its penultimate joint broader than long; proboscis 

 black, palpi yellow. Thorax black, gray pollinose and with four 

 black vitta?; three postsutural and three sternopleural macrocha?ta? ; 

 scutellum grayish black, bearing three long marginal pairs of 

 macrochsetse. Abdomen yellow, base of first segment and a dorsal 

 vitta extending to the third black, the third segment irregularly 

 tinged with blackish; first segment destitute of dorsal macrochsetse, 

 the second with a small discal and marginal pair, the third with a 

 discal pair and marginal row, fourth with a marginal row; venter 

 appearing as if longitudinally incised in the middle, the second and 

 third segments lobately produced, the lobes of the third segment 

 studded with short black spines on their terminal half. Legs black, 

 hind tibia? rather sparsely ciliate with short bristles, with a longer 

 one at the first fourth and one nearly twice as long at the middle. 

 Wings hyaline, third vein bearing four bristles at its base, the others 

 bare; apical cross vein straight, ending close to the third at last 

 fourth of distance from second to tip of wing; hind cross vein strongly 

 curved. Length 7 mm. Jacksonville, Florida. W. H. Ashmead. 

 A single specimen. 

 Acemyia dentata n. sp. 9- 



Black, the palpi (usually) and labella of proboscis yellow, face 

 and cheeks tinged with yellow. Front at vertex almost as wide as 

 either eye, the sides yellowish or gray pollinose, the vitta black, 

 next the antennae slightly narrower than either side of the front; 

 three pairs of forwardly directed orbital bristles; frontal bristles 

 descending nearly to middle of second antennal joint, three in each 

 row curving backward; sides of face bare, each at narrowest part 

 one-sixth as wide as the facial depression ; two or three bristles above 

 each vibrissa ; cheeks less than one-fifth as wide as the eye- height, 

 bare except on the lower half; antenna? two-thirds as long as the 

 face, the third joint nearly twice as long as the second, the apical 

 front angle produced in the form of a tooth; arista thickened on the 

 basal third. Thorax grayish pollinose, marked with four black 



